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Question

Acidified potassium permanganate solution is decolourised by :

A
Bleaching powder
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B
White vitriol
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C
Mohr's salt
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D
Microcosmic salt
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Solution

The correct option is C Mohr's salt
2KMnO4+2H2SO4K2SO4+2MnSO4+3H2O+[O]
2FeSO4Mohr - Salt+H2SO4+[O]Fe2(SO4)3+H2O]×5
2KMnO4+2MnSO4+5Fe2(SO4)3+8H2O
Mohr Salt reducing agent KMnO4/H+ oxidising agent

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